Vehicle dumping mechanism



' Ma 1927. 1 630 257 y E. A. DEWALD VEHICLE DUMPING MECHANISM Filed July 3. 1924 2 Sheets-Sheet 1 ATTORNEY 1927. 1,630,257 May E. A. DEWALD VEHICLE DUMPING MECHANISM Filed July 5. 1924 2 Sheets-Sheet 2 IN VENTOR ATTORNEY elil ' ED A D A. nnw'arngorf MAS$IL1IQONL Patented Max:731, 1927 oom'rAlvnforfnnw Yon 1\T.

directly over the vehicle; frame when. the

body is in its normal horizontal position.

With this situation the degree of tilt which can be imparted to the body isusually llmit- 'ed by interference of the rearportion ofthe the load.

vehicle frame. In a 'manually operated dumping mechanism it is not feasible to provide means for elevating the entire dump body with its contents in order to discharge It is Ptherefore necessary in order to secure a sufficient degree of tilt for effecting satisfactory discharge of the load to nor-. inally mount the bodyl distance above the vehicle frame.

at a considerable This distancejmust be sufficient sothat upon tilting I tively great the body "a sufficient degree of tilt; can be obtained before the bottom of the i body strikes the rear portion of the vehicle frame and thus prevents furthertilting movement.

The majority of standard vehicle frames to which bo'dies'of this class are attached have frames which extend out a considerable distance beyond the rear axle of'the vehicle and-are also provided with a cross. member' of'the frame which construction furtherincreases/the v difficulty of providing for an adequate tilt-1 ing movement of the body and requires at substantially the rear-end that the'body be normally mounted a reladistance above the frame. It is of course extremely desirable to provide. a dump 1 body and mechanism which canbe applied to certain standard motor vehicle frames Without'necessity of making' any substantial" alterationsin the construction 'of The invention cle and which at the I g 7 distance above the vehicle frain'eswhen; n tsv theframe. r a, V:

contemplates particularly a dumping mechanism such that the body readily attains an ample degree of .tilt when in dumping position without interference with the frame or other portions of the fvehi- :Applic'ation filed. $1115 3,

same time rests a" short" ome, assre voru o 'rn n G RIsco -nUssE L Y e.

Le COBBOEA'IION, on Dnr'zjAvvA n.

VEIiICI E nnnrme EoH-Anisrr.

1924. Serial No; 723-,914;

normal horizontal position; Toaccomplish these results thejdump body is arranged to be. moved bodily a considerabledistance toward; the rear of the vehicle into, dumping position. Bythis means, a considerable portion of-thebody may be projected over-the rear-of the vehicleframe when in dumping 1 position with the result that thebody may be normally supported at a notablylesser distance abovethe vehicle frame and still be operative to'provide an adequate degree of tiltwhen in dumping position. The invention also contemplates lowering of the body during its movement into dump ng position to'thus bring it into a more convenlent pos tion for dlscharge ofthe load.

The (lump body is supported upon a suitable inclined track or tracks secured-to the supporting members 'securejdlto the body are p e ab y e rs Projec ng vdoW ,,v'ia y rom t ody and e di g nt llin .vehicleframe." The; body is provided with supporting members which engage with the 4 :track and operate along it, thusproducing, the desired movement of the body. I; The

engagement with the supporting track, the centers of the sectors beingfdisp'osedto the rear of thecenter of gravity orna e body.

In this waythe sectorsgengage' the-track at 7' progressively increasing distances from; the center of grav ty of the diunp'body so that the radius of curvature of the curve"d escr bed by the center ofegravity'in moving from the normal position to the dumping pos1t1on increases. ,Thegresult of the mounting of the body in this manner isto give to it durng the dumping operationarelatively large I m io f tran a ion wa 'therea whil I it isbeing tilted. Thiscarries the b'ody well to the rear so that it clears the vehicle frame,

and moveover,- itreduces the amount of mothe movement of i the body reduces the strain on the shock chains andsprings .-1 The motionof the body during tilting preferablyroccurs in a series of pivotal steps,

posedzl successively farther from the center tion of rotation toward" the end of the d-u nplng movement which makes it easier to arrest To attain this effect the,trackis provided with a succession of pivot sockets and the 1 supp rts 1 1 the body a P v ded it corresponding number of; projections dis- 7 of gravity-of the bodyand-i which Ypivotally 'engageithe' Successive sge kets on the track hus'*provid'e the des red snccess on of pivotal movement's." The tracks e xtend rearwardly and downwardly with respect to the vehicle frame to thus facilitate easy :lurnp ing of the body and at the same time to produce the desired tilting movement and posi tioning of the. body for the dumping operation. 7 I o v I have illustrated aprefe'rred embodiment of my invention in the accompanying draW-' ings in which Figure l is 1 an elevational 'view with a part of ther'ear portion'of the vehicle broken away, shownigja motor ve hicle provided With a dumping-mechanismembodying my IDVQllt'LOIl, the dump: body be ng in its normal horizontal position; F ig- 'ure2 is a view. showing the body in dumping position; Figure fvlewtakfen on-line 33 of Figure 2; and

0 is'a transverse sectional Figure t-is a plan view of the vehiclechassis 1 illustrating a portion of the dumping m'ec'har nis1n V Referringto thedrawings, 1 indicates the frame of a vehicle here shown as a motor truck upon which the dump body 2'is supported; During transit the body 2--is car- "ried in horizontal position and is a supported substantiallyj ahove the rear axle of the --ve-' hicle at about the middle of its length, as

"shown in; Figure 1, A' locking meohanism I 3 is provided at the forward endof the dump body ,2 for securingthe body in" horizontal j [position'during'transit; -When it is desired to tilt-the body Z'theleVere isshifted to one [side or the other-to thus release thelo'cking mechanism 3, jwhereupon the body may ireadilyibeiltilted by graspingit at its forward end'and exerting an upward pull upon 'it. It will be noted thatthe body in its normal horizontal position is supported; are'latively short distance above the vehicle frame 1, so that the vehicle whenloa'ded-isnot top heavy and does" not'require support of ex of the vehicle and at the same'timeis'lowered V at its rear end to a considerable distance.

below thefl vehicle frame. In this fashion,

1 an adequate tiltto thebody is obtained for 'cessive"height between! the bodyand the frame.

-f Then thebody is tilted into dumping po- 'sition. as shown in'Figure2,-,it is bodily moved a substantial distance toward the rear dumping, yetitfmay be supported in normal are provide'dwith a series of'projections 7" in position upon the-tracks. .The sectorsiG I spaced along'the lower edge offthese'ctors and fitting respectively into the pivot sockets fl provide'dv along the tracks 5 Whenv the body is in its normal horizontal position the forward pivot projections engagewi'th the 'forwardand uppermost pivot sockets 8 on the tracks, as shown in Figure Upontilting thebody out of its horizontal position, the next'succeedingpair ofpivotpro: jections rcomes into engagement with *the next lower pair of" pivot sockets onthe tracks, and when the final dumping position is reached the body isisu pportedby engage;- 'ment of the rearmost projections 'with' the rearmost andlowermost pivot sockets onfthe tracks, r

The tilting:movementof the body ;is thus accomplished in a ."succession; of] pivotal. movements about. pivot points successively lower, successively farther-from thecenter of gravity of the body and successively farther toward the rear of the vehicle By: thus providing for the movement of the body in" a succession of; steps, the force of ithe shock of stopping the body when it has reached; its;

ultimate position of; tilt is lessened for the reason that the movement tending to pro dime-rotation about I each successive pivot point for the same position; of the, body.

Thus at each step ofthetilting movement of the body its movementkis checked andjit may be brought to rest in its ultimateposit-ionof tilt without undue strain upon the vehicle provided to limit the stresses; upon theive hicle parts. Moreovertthe combination 0f the rearwardly inclined-tracks with the sup-- porting sectors which coact with these tracks at successively increasing distances ifrom the center of gravity ofthe body provides for a. relatively great-movement of the body topoint is less'than that aboutthe preceding parts or the sho'ckchains9 andispring .1'0

ico

Ward the rear of'the vehicle during the"tilting operation. Hence the bodycan be normally supported during transit Well forward over the vehicle'frame, and-yet m be a 110 7 tion of the frame-Work offe'ven Vehicles 7 some diso-o tance to therearof therearaxle;

dumped by hand so as to" clear the rear por-- which have chassis that extend for An aiun'll ispreferablyprovided on the} frame 1 for engagement withta cross member 12 associated with the dump'body, VThe arm 11 engages the'member l2 inthe fashion shown, thus-locking the'bodyin' tilted position and avoiding premature return of the I body to horizontal position in case a por- V lodge inthe upper;

tion of the load should end of the tilted body.'f 1

While I have illustrated a preferred em-I bodiment of-myiinvention, certain changes a and modifications-may be made within thescope of the appended claims, 7 V V .I claim:

'1; Vehicle dumping-mechanismzjof J the class described, comprising ajdump-body, a

vehlcle frame havlng a cross-bar located near the rear'end of the dump-body and well to the rear of the vehicle axle, means on, the vehicle frame for'supporting said dump-body including steep downwardly and rearwardly sloping tracks, said tracks having thereon a'plurality of pivot-sockets located a substantial distance below the ve hicle frame, and feet on the dump-body ex tending a substantial distance below the" body and provided with sectors for coacting with said tracks, said sectors havingtheir front ends substantially the same vertical distance from the dump-body as their rear ends and having pivots on their peripheries for successively fitting into said pivot I sockets.

2. Vehicle dumping-mechanism of the classy described, comprising a dump-body, a vehicle j frame having a cross-bar located near the rear end of the dump-body and considerably to the rear of the vehicle axle,"

means on the vehicle frame for supporting said dump-body including steep downwardly and rearwardly sloping tracks having racks thereon extending from a point substantially vertically above the rear axle of the vehicle to a point substantially vertically beneath the rearmost end of the vehicle frame, said racks comprising a series of pivot-sockets, the lowermost. of said sockets being at a considerable distance below the rear axle of the vehicle and the uppermost 7 being at a considerable distance below the frame of the vehicle, and feet integral with said dump-body having sectorsthereon having their front ends the same distance from the dump-body as their, rear ends, and having pivots on their peripheries engaging with said pivot sockets to support said dump-body-at progressively increasing oblique distances from the center of gravity of said dump-body, atprogressively increashaving a cross-bar located near the rear end of the dump-body and considerably to the rear of the vehicle, feet integral with said dump-body and having ,sectors. the

geometrical centers of which arelocated at a point considerably to the rear of the center of gravity of said dump-body and having their front ends and their rear ends at the same vertical distance from said dump-body, and steeply downwardly and backwardly sloping supporting tracks for said dump-i body associated with said vehicle frame and having racks thereon coacting with said sectors, 'said racks having the uppermost center of support for said sectors at a point substantially directly above the rear axle I t I of thevehicle, and the lowermost center of support at a point substantial-1y directly beneath the rearinost cross-bar of the vehicle. c. I I

4'. In a vehicle dumplng-mechanism, 1n

' combination, a vehicle frame having, a cross bar located near the rear end of the dumpbody and considerably to the rear of the vehicle axle, sectors integral with feet attached to said dump-body, said sectors hav-- ing their geometrical centers located at a point considerably to the rear of the center of gravity of said dump-body, having their front ends and their rear-ends atthe same vertical distance beneath the dump-body,v

and having a plurality of widely separated, equidistant pivot-points distributed over their peripheries, said pivot-points comprising teeth having a pitch considerably greater than their length," and steeply downwardly and backwardly sloping sup porting tracks for said sectors and dumpbody, said tracks having racks thereoncom prising a plurality of separately-grouped} pivot-socket members distributed at equal intervals thereon, the uppermost of said sockets being at a point substantially directly above the rear axle of the vehicle and the lowermost being at a point substantially directly beneath therearmost frame cross-bar, each of said pivot-s0ckets comprising a pair of oppositely-facing teeth integral with the racks, and having their pitch considerabl greater than'their length. I

In testimony whereof I aflix my signature.-

c EDWARD A. DEWALD; 

